package org.example.cloud.controller;

import io.github.resilience4j.bulkhead.annotation.Bulkhead;
import io.github.resilience4j.circuitbreaker.annotation.CircuitBreaker;
import io.github.resilience4j.ratelimiter.annotation.RateLimiter;
import jakarta.annotation.Resource;
import org.example.cloud.api.PayFeignApi;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.TimeUnit;

/**
 * @author 宋孟林
 * @description
 * @date: 2025/4/7 17:22
 */
@RestController
public class OrderCircuitController {
    @Resource
    private PayFeignApi payFeignApi;

    @GetMapping(value = "/pay/circuit/{id}")
    @CircuitBreaker(name = "cloud-payment-service-provider", fallbackMethod = "myCircuitFallback")
    public String myCircuitBreaker(@PathVariable("id") Integer id) {
        return payFeignApi.myCircuit(id);
    }

    //myCircuitFallback就是服务降级后的兜底处理方法
    public String myCircuitFallback(Integer id,Throwable t) {
        // 这里是容错处理逻辑，返回备用结果
        return "myCircuitFallback，系统繁忙，请稍后再试-----/(ㄒoㄒ)/~~";
    }

    /**
     * 舱壁,隔离 ,舱壁用来控制访问的最大并发量 注解@Buldhead表示这个请求用舱壁处理
     * @param id 访问id
     * @return 访问结果
     */
//    @GetMapping(value = "/pay/bulkhead/{id}")
//    @Bulkhead(name = "cloud-payment-service-provider",fallbackMethod = "myBulkheadFallback",type = Bulkhead.Type.SEMAPHORE)
//    public String myBulkhead(@PathVariable("id") Integer id) {
//        return payFeignApi.myBulkhead(id);
//    }

    /**
     * 达到舱壁设定的并发数量的时候触发这个服务降级
     * @param t t
     * @return string
     */
    public String myBulkheadFallback(Throwable t) {
        return "myBulkheadFallback，隔板超出最大数量限制，系统繁忙，请稍后再试-----/(ㄒoㄒ)/~~";
    }

    /**
     * (船的)舱壁,隔离,THREADPOOL
     * @param id
     * @return
     */
    @GetMapping(value = "/pay/bulkhead/thread/{id}")
    @Bulkhead(name = "cloud-payment-service-provider", fallbackMethod = "myBulkheadPoolFallback", type = Bulkhead.Type.THREADPOOL)
    public CompletableFuture<String> myBulkheadTHREADPOOL(@PathVariable("id") Integer id) {
        System.out.println(Thread.currentThread().getName() + "\t" + "enter the method!!!");
        try { TimeUnit.SECONDS.sleep(3); } catch (InterruptedException e) { e.printStackTrace(); }
        System.out.println(Thread.currentThread().getName() + "\t" + "exist the method!!!");
        return CompletableFuture.supplyAsync(() -> payFeignApi.myBulkhead(id) + "\t" + " Bulkhead.Type.THREADPOOL");
    }

    public CompletableFuture<String> myBulkheadPoolFallback(Integer id, Throwable t) {
        return CompletableFuture.supplyAsync(() -> "Bulkhead.Type.THREADPOOL，系统繁忙，请稍后再试-----/(ㄒoㄒ)/~~");
    }

    @GetMapping(value = "/pay/ratelimit/{id}")
    @RateLimiter(name = "cloud-payment-service",fallbackMethod = "myRatelimitFallback")
    public String myBulkhead(@PathVariable("id") Integer id) {
        return payFeignApi.myRatelimit(id);
    }
    public String myRatelimitFallback(Integer id,Throwable t) {
        return "你被限流了，禁止访问/(ㄒoㄒ)/~~";
    }
}
